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Related Experiment Video

Updated: Jun 28, 2026

Fabrication of Carbon Nanotube High-Frequency Nanoelectronic Biosensor for Sensing in High Ionic Strength Solutions

Fabrication of Carbon Nanotube High-Frequency Nanoelectronic Biosensor for Sensing in High Ionic Strength Solutions

Published on: July 22, 2013

Nanowire conductive polymer gas sensor patterned using self-assembled block copolymer lithography.

Yeon Sik Jung¹, WooChul Jung, Harry L Tuller

¹Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.

|October 29, 2008

Summary

Researchers fabricated ordered conducting polymer nanowires for organic electronics. These nanowires function as highly sensitive ethanol vapor sensors due to their increased surface area.

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Area of Science:

Materials Science
Nanotechnology
Organic Electronics

Background:

Nanostructured conjugated organic thin films are crucial for advanced organic devices.
Developing methods for large-area fabrication of these nanostructures is essential.

Purpose of the Study:

To demonstrate the large-area fabrication of well-ordered conducting polymer nanowires.
To investigate the sensing capabilities of these nanowires for ethanol vapor.

Main Methods:

Utilized self-assembled patterns of cylinder-forming poly(styrene-b-dimethylsiloxane) diblock copolymer as an etch mask.
Confined the diblock copolymer within topographic templates for controlled patterning.
Fabricated poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) nanowires with a width of 15 nm.

Main Results:

Successfully achieved large-area fabrication of ordered 15 nm wide conducting polymer nanowires.
The fabricated nanowires demonstrated functionality as ethanol vapor sensors.
The electronic properties of the organic film were maintained post-patterning.

Conclusions:

The enhanced surface-to-volume ratio of the nanowire array significantly increased ethanol vapor sensitivity compared to unpatterned films.
This fabrication method is promising for developing highly sensitive organic sensors and integrated organic devices.